1125550081 has 4 divisors (see below), whose sum is σ = 1153002564. Its totient is φ = 1098097600.

The previous prime is 1125550079. The next prime is 1125550091. The reversal of 1125550081 is 1800555211.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 592679025 + 532871056 = 24345^2 + 23084^2 .

It is a cyclic number.

It is not a de Polignac number, because 1125550081 - 2¹ = 1125550079 is a prime.

It is a super-2 number, since 2×1125550081² = 2533725969678213122, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1125550091) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13726180 + ... + 13726261.

It is an arithmetic number, because the mean of its divisors is an integer number (288250641).

Almost surely, 2^1125550081 is an apocalyptic number.

It is an amenable number.

1125550081 is a deficient number, since it is larger than the sum of its proper divisors (27452483).

1125550081 is an equidigital number, since it uses as much as digits as its factorization.

1125550081 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27452482.

The product of its (nonzero) digits is 2000, while the sum is 28.

The square root of 1125550081 is about 33549.2187837511. The cubic root of 1125550081 is about 1040.2113971775.

The spelling of 1125550081 in words is "one billion, one hundred twenty-five million, five hundred fifty thousand, eighty-one".